Improvement in grin ding-machines



L. SEIFPERT. Grinding-Machine.

No. 222,539. PatentegDec. 9, I879.

N-PETERS, PHOTO-LITHOGRAPHER. WkSHINGTON D C.

UNITED STATES PATENT ()FFICE.

LOUIS-SEIFFERT', OF M. GLADBAGH, PRUSS1A, GERMANY.

IMPROVEMENT IN G RIND l N G- M'AGH IN ES.

Specification forming part ofiLetters Patent N0. 222,539,.dated December 9, 1879; application filed October 18, 1879, patented in England, May 27, 1879 in Austria-Hungary, May 27, 1879, and in France, J nne 27,

The setting up or grinding of doctor-blades employed in calico-printing machines to, re-

-move or scrape the superfluous color from the a PIIHlEIHg-IQllShEtS, sofar as- Iamaware, been efi'ected to the present time by hand labor and by means of the file and whetstone. This process requires a great deal of time and labor,

and demands the employment of more or less 7 skilled workmen, as it is ,well known that both a the bevel, but especially the scraping-face, of these blades have to be absolutely truein order to perform the work; they are intended for I properly. 7

The design of m y invention isto dispense with such hand-laborby settin gnp or grinding these doctor-blades upon and by mechanical devices adapted to produce a better result thancould be obtained by hand, and efiect'a great saving in labor and expense, as hereinafter fully descrlbed, and shown in the accompanying drawings, in which- Figure l is a side elevatiomFig. 2 a plan, and Fig. 3 a section takenon line 00 x of Fig. ,1, of my improved machine and Figs. 4 and 5 are detail views.

Like letters of reference are employed to indlcate like parts wherever such may occur in a the above figures of drawings, in which- A represents the main frame, upon which the-operating mechanism is mounted. It is provided with a beveled guideway, a a, upon which is fitted and upon which slides the carriage composed of the blocks B, rigidly connected together by. means of a flat rectangular bar or plate, I), bolted to the under side of said blocks, and which carries a rack-bar, B, that ;meshes with a pinion, 0, upon a shaft, 0, that has its hearings in the sides of the frame A, and carries at its outer'end a crank, c,'by

and carriage maybe employed. For instance,

the blocks may be made to slide on rails, and to prevent lateral. displacement they may be provided with flanges bearing against the outer or the inner vertical faces of said rails. The upper face of each slide is recessed, and

the inner vertical faces of the recesses are beveled to receive the correspondingly-beveled supporting-blocks D, which are fitted within said recesses and adapted to be moved laterally to adjust them in proper position relatively to the grinding-wheels. This adjustment is effected by means of screws d, supported from and having their bearings in brackets d, secured within the recesses to the slides B.

E is the clamp, within which the doctorblade is clamped. It is formed of two parts, 6 e, the lower face of the part 6 being convex to fit the concavity in the upper face of the supportingblocks D and prevent lateral displacement. The contiguous faces of that portion of the clamp between which the doctorblade is held are cut away to accommodate the thickness of said blade and its trunnions or pivots, and when said blade is in proper position its forward or scraping edge projects some distance in front of said clamp, which is secured to the supportingblocks bymeans of the screws f, which latter pass through the two parts of the clamp and into the blocks, as shown.

G is a slotted supporting-plate, made adjustable vertically upon the side of the frame A by means of a screw, g, and when adjusted is fixed in position by means of the set-screw g and a washer, g

The plate Gr serves to support the outer or scraping edge of the doctor-blade F, and pres. vents vibrating motion of said blade when acted upon by the grinding-wheels, and to that efi'ect has an extended upper bearingsurface, upon which a considerable portion of the doctor-blade F may rest, (see Figs. 1 and 3;) and it will be obvious to those acquainted with the grinding of doctor-blades that neither a true bevel nor a true face could be ground were the blade allowed to vibrate under the rapid revolution of the grinding-wheels.

I is the face-wheel, or that grinding-wheel which grinds the front or face of the doctorblade. It is mounted upon a shaft, I, which has its bearings in bearing-blocks i, adjustably secured to the brackets A, bolted to the side of the frame A. The beariu g or supporting-ledge, of the brackets A is slotted, and through these slots a and the bearing-blocks i pass the screw-bolts i, by which means the grinding-wheel I may be adjusted to the face of the doctor-blade.

K is the grinding-wheel, which grinds the bevel on the doctor-blade, and is mounted upon a shaft, K, which latter is vertically adjustable in its hearings it, formed on or bolted to the standards A secured to the side of the frame A, the vertical adjustment of this shaft K being effected by the adjusting-screws 70 k one above and the other below the bearing-blocks K Each shaft I and K carries a fast and a loose pulley, L L, respectively, the purposes of which are obvious, the fast pulleys L being driven from any suitable motor.

Instead of driving or belting the fast pulleys L separately from or to a prime motor, these may be so arranged as to be driven by the same belt, if desired, as will be readily understood, though I prefer in all cases to provide means for driving either of the grinding-wheels alone, which, under some circumstances, becomes necessary.

The vertical adjustment of the shaft K is also necessary to adjust the grinding-wheel K relatively to the doctor-blade 1'.

Both grinding-wheels may be formed ofany of the well-known abrading substances in use for that purpose, such as emery and other like substances or stone. I employ, preferably, emery-faced wheels.

L is a sliding bar carrying the belt-forks l l, and is provided with suitable stops. The bar slides in bearings l, secured to the standards A and is employed to shift the belt of either of the driving-pulleys to the adjacent loose pulleys, and vice versa.

The operation of the machine is as follows: The doctor-blade being placed between the two sections of the clamp E, as described, the latter is secured to the blocks D by means of the screwsf, and adjusted to the grindingwheels I K by means of the screws (1 and the said blocks D. The supporting-plate G is then adjusted to bear against the lower face of the doctor-blade F at its forward edge and the grinding-wheels set in motion. As the face and bevel of the blade are ground said blade is moved forward upon the guideways a-, by means of the crank c, to revolve the shaft 0 and pinion O, which latter, meshing into the rack-bar B, moves said rack-bar, the slides B, clamp E, and blade 1 forward along the grimling-wheels, and back again when said blade has been fed forward to the end thereof.

Having now described my invention, what I claim, and desire to secure by Letters Patent is-- 1. In a machine of the class described, the combination of a movable support for the doctorblade, grinding-wheels arranged to simultaneously grind the edge or front face and the bevel of said blade. means, substantially as described, for laterally adjusting said movable support and one of the grinding-wheels and vertically adjusting the other grindingwheel, and mechanism, as set forth, for feeding the support for the blade along the face of said grinding-wheels, all combined and arranged to operate substantially as and for the purpose specified.

2. The combination of the clamp 'E or support for the doctorblade, constructed as set forth, the blocks D, adjusting-screws (1,

slides B B and their connections, and the guideways a aof the frame with the grind ing-wheels I K, the former adjustable laterally, the latter vertically, and the vertically; adjustable plate G, all combined, constructed, and operating substantially as shown, and for the purpose specified.

In witness that I claim the foregoing I have hereunto set my hand this 12th day of August, 1879.

LOUIS SEIFFERT.

\Vitnesses:

KARL AssEmR, EMIL SeHMmr. 

